package juc.juccore.lock.lock;

import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class TryLockDeadlock implements Runnable {
    private static Lock lock1 = new ReentrantLock();
    private static Lock lock2 = new ReentrantLock();
    int flag = 1;

    public static void main(String[] args) {
        TryLockDeadlock r1 = new TryLockDeadlock();
        TryLockDeadlock r2 = new TryLockDeadlock();
        r2.flag = 2;
        new Thread(r1).start();
        new Thread(r2).start();

    }

    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            if (flag == 1) {
                try {
                    if (lock1.tryLock(1, TimeUnit.SECONDS)) {
                        try {
                            System.out.println("线程1获得了锁1");
                            Thread.sleep(new Random().nextInt(1000));
                            if (lock2.tryLock(1, TimeUnit.SECONDS)) {
                                try {
                                    System.out.println("线程1获得了锁2");
                                    System.out.println("线程1共计获得了两把锁");
                                    break;
                                } finally {
                                    lock2.unlock();
                                }
                            } else {
                                System.out.println("线程1获取锁2失败,已重试");
                            }
                        } finally {
                            lock1.unlock();
                        }
                    } else {
                        System.out.println("线程1获取锁1失败,已重试");
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            if (flag == 2) {
                try {
                    if (lock2.tryLock(2, TimeUnit.SECONDS)) {
                        try {
                            System.out.println("线程2获得了锁2");
                            Thread.sleep(new Random().nextInt(1000));
                            if (lock1.tryLock(1, TimeUnit.SECONDS)) {
                                try {
                                    System.out.println("线程2获得了锁1");
                                    System.out.println("线程2共计获得了两把锁");
                                    break;
                                } finally {
                                    lock1.unlock();
                                }
                            } else {
                                System.out.println("线程2获取锁1失败,已重试");
                            }
                        } finally {
                            lock2.unlock();
                        }
                    } else {
                        System.out.println("线程2获取锁2失败,已重试");
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }

    }
}